With an absurd oversimplification, the “invention” of calculus [method in mathematics] is — Richard Courant
With an absurd oversimplification, the ‘invention’ of the calculus is sometimes ascribed — Richard Courant
For scholars and laymen alike it is not philosophy but active experience in mathematics — Richard Courant
Mathematics as an expression of the human mind reflects the active will, the contemplative reason — Richard Courant